Apparatus for drying powders.



No. 761,763. PAT-ENTED JUNE 7, 1904'. .11. GROIZIBR.

APPARATUS FOR DRYING POWD'FRS.

APPLICATION FILED OCT. 4, 1901.

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APPARATUSFOR DRYING POWDERS.

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Patented June '7', 1904.

PATENT OFFICE.

HENRI CROIZIER, or PARIS, FRANCE.

APPARATUS FOR DFi Y-IN G POWDERS.

SPECIFICATION forming art of Letters Patent No. 761,763, dated June 7, 1904.

Application filed October 4:, 1901.

To all whom it may concern.-

Be it known that I, HENRI (JRoIzIER, a citizen of the French Republic, residing at 9 Rue de Mogador, Paris, in the French Republic, have invented a new and Improved Apparatus for Drying Powders, of which the following is a specification.

For certain applications it is well known that it is necessary to heat sand or other powdery substances. Various apparatuses have beenproposed hitherto; but they are generally expensive and cumbersome.

The present invention relates to a new arrangement for drying sand or other powdery substances and is characterized, essentially, by utilizing the waste heat of the smoke escaping from any kind of fire into the chimney. The sand is raised to the top of the chimney by any suitable means and allowed to fall in a fine shower through the smoke rising in the chimney. The dry sand is collected at the lower part of the chimney in any suitable kind of receiving-chamber. It is to be understood that the means for bringing the sand to the top of the chimney and the arrangement of the receptacle for the dry sand, &c., may be modified according to the arrangements of the factories where the process is employed.

A practical form of an arrangement for carrying this invention into effect is illustrated,by way of example, in the accompanying drawings.

Figure 1 is an elevation of the chimney. Fig. 2 is apart sectional elevation of the chimney on an enlarged scale. Fig. 3, which illustrates a corner of the chimney on an enlarged scale. is for the purpose of showing certain details, notably the arrangement of the heatinsulating material and the disposition of the bafiiers.

As will be seen, the chimney consists of superposed cast sectionsa. The whole is supported by three or more stays Z) with coupling-screws c, said stays being anchored as firmly as possible in the ground at cl. The sand is'raised in the conduit 6 by any suitable meansfor.instance, by a chain-pumpand falls in a fine shower through the spout f at the top of the chimney. The shower is broken Serial No. 77,618. (No model.)

up bythe baiiiers 5 These bafflers g in orof example, one consisting of an oblique chan nel and the other of a tube.

It is the aperture through which the smoke enters from the furnace.

, The dry sand falls at i into the receptacle,

whence it can afterward be removed through the hopper j, and it can be sifted eventually by means of suitable sieves.

Windows is is, provided with mica, glass, or other transparent material, are arranged in the lower compartment, which allows the quantity of sand it contains to be ascertained.

The upper part of the chimney is provided with a sheet-iron chimney Z, which increases the draft in order to compensate for the losses produced by the meeting of the smoke with the falling sand-and with the bafflers for distributing the sand. The sheet-iron chimney Z is provided with ties m. I

In order to prevent cooling, the outer part of the chimney is provided with a heat-insulating coating 0, supported by sheet-iron or other material p. This casing is attached to the stays b, as shown in Fig. 3.

It is understood that any suitable means may be employed for connecting together the various sections forming the chimney.

It is obvious that in certain cases it will not be necessary to raise the sand to the top of the chimney by means of a conveyer. This willbe the case, for instance, when the store of sand is higher than the top of the chimney, as when the factory is situated close to elevated ground. In this case the sand can pass down a natural declivity to the level of its entrance to the chimney.

What I claim is 1. In means for drying powdery materials the combination of a chimney carrying away the gases of any industrial fireplaces and consisting of superposed cast sections provided with a heat-insulating coating, a spout introducing the said powder, tube-bafilers arranged in Zigzag for producing a shower of the powder down said chimney and stays anchored in the ground fastening the sections together, substantially as described.

2. In means for drying powdery materials the combination of a chimney carrying away the gases from any industrial fireplaces and consisting of superposed cast sections provided with a heat-insulating coating, :1 spout introducing the said powder, tube-bafflers arranged in zigzag for producing a shower of the powder down said chimney and stays anchored in the ground fastening the sections together the first section from the bottom containing the hopper for carrying away the dried male rials, the second being provided with peepholes and the third containing the entrance for the hot gases, substantially as described.

In testimony whereof I have signed my name to this specification in the presence 01 two s11bscribing witnesses.

HENRI CROI ZIER.

WVitnesses:

JEAN BOUYER, EDWARD P. MAOLEAN. 

